PDS_VERSION_ID          = PDS3                                                
RECORD_TYPE             = STREAM                                              
                                                                              
OBJECT                  = TEXT                                                
   INTERCHANGE_FORMAT   = ASCII                                               
   PUBLICATION_DATE     = 2001-02-13                                          
   NOTE                 = "SCL-Kernel Information"                            
END_OBJECT              = TEXT                                                
                                                                              
END                                                                           
                                                                              
                                                                              
General information about SPICE SCL-kernels                                   
===========================================                                   
                                                                              
   In the SPICE system, Spacecraft Clock (or SCL) -kernel contains a          
   set of information required to perform a mapping between Ephemeris         
   time (ET) and spacecraft on-board time (SCLK).                             
                                                                              
   The spacecraft clock coefficient information contained in SCLK file        
   can be manipulated by a collection of FORTRAN 77 subroutines to            
   provide a transformation between Ephemeris and spacecraft on-board         
   times. These subroutines are part of the SPICELIB library and can          
   be integrated into user application programs. The SPICE system             
   toolkit for a number of computer platforms or information regarding        
   how it can be obtained is located in the SOFTWARE subdirectory of          
   the main directory of this dataset.                                        
                                                                              
   Refer to the SCLK.REQ document provided with the toolkit or available      
   from the NAIF Node of PDS if SPICE toolkit is not included with            
   this data set to get more information about conversion between ET          
   and spacecraft clock times.                                                
                                                                              
                                                                              
NEAR SCL-kernel contained on this volume                                      
=======================================                                       
                                                                              
   This volume contains the NEAR SCLK file.  The SCLK file covers the entire  
   NEAR mission time range. The files are named "NEAR_<sequencenumber>.TSC.   
   The most recent file is at the time of data set creation is included.      
   For example:                                                               
                                                                              
           NEAR_171.TSC   NEAR Spacecraft clock coefficients Kernel           
                                (SCLK) file .                                 
                                                                              
   This SCLK file contains actual NEAR on-board clock to ET mapping           
   coefficients computed using time calibration packets from the spacecraft   
   engineering telemetry.                                                     
                                                                              
                                                                              
Kernel File Details                                                           
===================                                                           
                                                                              
   The most detailed description of the data in an SCLK file is               
   provided in metadata included inside the description area of               
   the file. This information can be viewed using any text editor             
   program.                                                                   
                                                                              
                                                                              
Contact Information                                                           
===================                                                           
                                                                              
   For NEAR specific information, contact:                                    
                                                                              
       NEAR Science Data Center                                               
       Howard W. Taylor                                                       
       The Johns Hopkins University                                           
       Applied Physics Laboratory                                             
       11100 Johns Hopkins Road                                               
       Laurel MD 20723                                                        
       Email: Howard.Taylor@jhuapl.edu                                        
                                                                              
   For general information about the SPICE system:                            
                                                                              
      Charles H. Acton, Jr,                                                   
      (818)-354-3869,                                                         
      Chuck.Acton@jpl.nasa.gov,                                               
                                                                              
   or                                                                         
                                                                              
      Boris Semenov                                                           
      (818)-354-8136                                                          
      Boris.Semenov@jpl.nasa.gov                                              
                                                                              
   address:                                                                   
                                                                              
      Navigation and Ancillary Information Facility (NAIF)                    
      Jet Propulsion Laboratory                                               
      MS 301-125L                                                             
      4800 Oak Grove Drive                                                    
      Pasadena CA 91109 USA